A novel endoscopic hand-suturing technique for defect closure after colorectal endoscopic submucosal dissection: a pilot study

Prophylactic clip closure in preventing delayed bleeding after colorectal endoscopic submucosal dissection in patients on anticoagulants: a multicenter retrospective cohort study in Japan

BACKGROUND

 The effectiveness of prophylactic clip closure in reducing the risk of delayed bleeding after colorectal endoscopic submucosal dissection (ESD) is uncertain among patients on anticoagulants. We therefore aimed to assess this effectiveness using data from a large multicenter study.

METHODS

 We used the ABCD-J study database to analyze delayed bleeding among 34 455 colorectal ESD cases from 47 Japanese institutions. Delayed bleeding rates among the no/partial and complete closure groups were compared in patients on direct oral anticoagulants (DOACs) or warfarin. Propensity score matching was used for baseline characteristics to reduce the effects of selection bias.

RESULTS

 Overall, data from 1478 patients on anticoagulants who underwent colorectal ESD were examined. After propensity score matching, the complete and no/partial closure groups were compared in 212 patients on DOACs and 82 on warfarin. The complete closure group showed a significantly lower delayed bleeding rate in patients receiving DOACs (10.8 % vs. 5.2 %, absolute risk reduction [ARR] 5.7 %, P = 0.048) and warfarin (17.1 % vs. 6.1 %, ARR 11.0 %, P = 0.049). Additionally, complete closure significantly reduced the risk of delayed bleeding among patients taking DOACs for right-sided lesions (ARR 6.7 %, P = 0.04), whereas no risk reduction was observed for left-sided (P > 0.99) or rectal (P = 0.50) lesions. A similar trend was observed among patients on warfarin.

CONCLUSIONS

 Prophylactic complete clip closure after colorectal ESD significantly reduced the delayed bleeding rate in patients receiving DOACs or warfarin. It should be performed after ESD, particularly for right-sided lesions.

Feasibility of traction band-assisted endoscopic closure for mucosal defects after colorectal endoscopic submucosal dissection: a multicenter prospective single-arm pilot study

The complete closure of mucosal defects following colorectal endoscopic submucosal dissection (ESD) is often challenging. We invented a traction band-assisted endoscopic closure (TBEC) technique using clips with an integrated traction band. We aimed to evaluate the feasibility of TBEC for closing mucosal defects following colorectal ESD.This multicenter prospective single-arm pilot study was conducted at three institutions from June 2022 to March 2023. A total of 34 patients with colorectal neoplasms measuring 20-50 mm scheduled for ESD were enrolled. TBEC was performed at each mucosal defect after ESD. The primary outcome was the complete closure rate by TBEC. Secondary outcomes included the number of clips used, procedure time, and adverse events (AEs).TBEC yielded a 100% (95%CI 89.8%-100%) complete closure rate, with a median (interquartile range [IQR]) closure time of 14.5 (12.9) minutes. The median (IQR) number of clips used was 10 (3.3). One case of delayed bleeding and one of post-ESD coagulation syndrome (both 2.9% [95%CI 0.5%-14.9%]) occurred following TBEC.This study demonstrated the feasibility of TBEC for the closure of mucosal defects following colorectal ESD. TBEC is a simple and easily applicable technique for endoscopic closure. Further studies are required to evaluate its efficacy in reducing delayed AEs.

Predictive Factors for Procedure Time for Closure of Mucosal Defect Following Colorectal Endoscopic Submucosal Dissection

Goals

The present study was conducted to clarify predictive factors related to procedure time for closure of a mucosal defect following colorectal endoscopic submucosal dissection.

Background

To prevent complications following a colorectal endoscopic submucosal dissection (ESD) procedure, closure of the resultant mucosal defect is considered to be most effective. However, closure after colorectal ESD is challenging, and technical difficulties can lead to a longer procedure time. Although it is important to clarify predictive factors related to the time needed for effective treatment planning, no such validated data obtained prior to the present study have been reported.

Study

Overall, 61 consecutive patients who underwent colorectal ESD for a colorectal neoplasm sized greater than 20 mm were enrolled. Immediately after performing colorectal ESD, closure of the mucosal defect was implemented using a loop clip closure method. Factors with influence on closure procedure time were evaluated using multiple linear regression analyses.

Results

Results obtained with a multiple linear regression model demonstrated that resected specimen size (β = 0.690, p < 0.01) and colon site (β = -0.209, p = 0.027) were factors with influence on the closure procedure. Those results were considered relevant to explain the 50.5% variance in time until completion of closure; thus, goodness of fit was considered to be high.

Conclusions

Findings obtained in this study were helpful to clarify predictive factors with influence on procedure time. The fit of the model was good, thus allowing for closure performance based on outcome prediction.

The use of endoclips in continuous manual endoscopic suturing as a potential method to reduce defect closure time after endoscopic submucosal dissection

The manuscript presents a novel approach to enhance the efficiency of continuous manual endoscopic suturing without compromising its effectiveness. This technique, still in its early stages of implementation across various centers, holds immense promise but faces the challenge of extended procedure times. The proposed method aims to address this limitation by streamlining specific steps, potentially leading to significant time saving.

Closure strength of endoscopic hand-suturing in ex vivo porcine gastric ESD defect models: an exploratory animal study

BACKGROUND

Endoscopic hand-suturing (EHS) has been used to close gastrointestinal defects following endoscopic submucosal resection (ESD), but its closure strength needs further evaluation. This exploratory animal study aimed to compare the closure strength of EHS and titanium clips in ex vivo porcine gastric ESD defect models.

METHODS

Fifteen porcine stomachs were used to create ESD defect models, each featuring a 2-3-cm defect in the gastric body and another in the antrum. Defects were randomly assigned to three groups: EHS group (Group A), dense clipping group (Group B), and loose clipping group (Group C). Under endoscopy, Group A defects were sutured with 4 stitches, Group B with 7 clips, and Group C with 4 clips. The primary outcome measures were overall closure strength and closure strength per unit length, measured with a digital spring scale. Differences among groups were analyzed with the Kruskal-Wallis H test.

RESULT

All 30 defects were successfully closed endoscopically. Group A achieved significantly higher overall closure strength [1.06 kg (0.96 kg, 1.22 kg)] compared to Group B [0.27 kg (0.19 kg, 0.31 kg), P = 0.026] and Group C [0.11 kg (0.09 kg, 0.15 kg), P < 0.001]. For the closure strength per unit length, Group A [0.33 kg (0.27 kg, 0.35 kg)] also outperformed Group B [0.08 kg (0.06 kg, 0.10 kg), P = 0.023] and Group C [0.04 kg (0.03 kg, 0.04 kg), P < 0.001].

CONCLUSION

EHS can provide superior closure strength for ex vivo gastric ESD defects compared to simple titanium clips.

Feasibility of a new endoscopic suturing device: a first Western experience (with video)

BACKGROUND AND AIMS

Endoscopic hand suturing (EHS) is a new technique for the closure of mucosal defects in the GI tract. Although this method was tested for wound closure after endoscopic submucosal dissection (ESD) in Japan, a feasibility test in a Western setting is lacking. In this study, we present our first experience with EHS for different indications and in different anatomic locations.

METHODS

The technical success of EHS and suturing speed were retrospectively determined for all available EHS cases in our center. Technical success was defined as complete closure of the mucosal defect or visually tight fixation of the target.

RESULTS

A total of 19 EHS procedures were performed in 17 patients (mean age, 54.9 years; standard error of the mean [SEM], 4.2 years; male, 53% [n = 9]). Technical success was achieved in 78.9% (n = 15). Total EHS operation time was 40.0 minutes (SEM, 3.1 minutes) with 3.3 minutes (SEM, 0.2 minutes) per single stitch. In a constant team of endoscopist and assistant, mean stitch times declined significantly from the first 4 to the second 4 of 8 cases (4.0 [SEM, 0.6] vs 2.3 [SEM, 0.2] minutes, P = .02).

CONCLUSIONS

EHS was technically feasible and applicable in different anatomic locations. Further studies may elucidate a possible effect on adverse event rates of endoscopic resections.

Closure methods for large defects after gastrointestinal endoscopic submucosal dissection

Nowadays, endoscopic submucosal dissection (ESD) is commonly performed for the removal of large gastrointestinal lesions. Endoscopic mucosal defect closure after ESD is vital to avoid adverse events. In recent years, many innovative instruments have emerged and proved to be beneficial. In this paper, we conducted a thorough literature review and summarized the closure methods for large-size post-ESD mucosal defects over decades. We separated these methods into five categories based on the operational principle: "side closure" method, "ring closure" method, "layered closure" method, "hand suturing closure" method, and "specially designed device closure" method. Side closure with clips assisted by instruments such as threads or loops is applicable for each segment of the gastrointestinal tract to prevent postoperative bleeding. If the defect tension is too large to close with the traditional side closure methods, zigzag closure and ring closure could be applied to gather the bilateral defect edges together and achieve continuous closure. In the stomach and rectum with a high risk of submucosal dead space between the submucosa and muscular layers, side closure methods with muscle layer grasping clip or layered closure methods could enable the involvement of the deep submucosa and muscle layers. The ring closure method and specially designed devices including over-the-scope clip, Overstitch, and X-tack could resolve perforation effectively. Individual closure method requires endoscope reinsertion or sophisticated operation, which may be limited by the deep location and the narrow lumen, respectively. Although specially designed devices are expected to offer promising prospectives, the cost-effectiveness remains to be a problem.

Endoscopic hand suturing using a modified through-the-scope needle holder for mucosal closure after colorectal endoscopic submucosal dissection: Prospective multicenter study (with video)

OBJECTIVES

Endoscopic hand suturing (EHS) is a novel technique for closing a mucosal defect after endoscopic submucosal dissection (ESD). We investigated the technical feasibility of colorectal EHS using a modified flexible through-the-scope needle holder.

METHODS

This was a prospective multicenter study conducted at two referral centers between June 2022 and April 2023. This study included colorectal neoplasms 20-50 mm in size located in the sigmoid colon or rectum. A modified flexible through-the-scope needle holder, with an increased jaw width to facilitate needle grasping, was used for colorectal EHS. The primary end-points were sustained closure rate on second-look endoscopy (SLE) performed on postoperative days 3-4 and suturing time for colorectal EHS. Secondary end-points included complete closure rate and delayed adverse events.

RESULTS

We enrolled 20 colorectal neoplasms in 20 patients, including four patients receiving antithrombotic agents. The tumor location was as follows: lower rectum (n = 8), upper rectum (n = 2), rectosigmoid colon (n = 4), and sigmoid colon (n = 6), and the median mucosal defect size was 37 mm (range, 21-65 mm). The complete closure rate was 90% (18/20 [95% confidence interval (CI) 68.3-98.8%]), and the median suturing time was 49 min (range, 23-92 min [95% CI 35-68 min]). Sustained closure rate on SLE was 85% (17/20 [95% CI 62.1-96.8%]). No delayed adverse events were observed.

CONCLUSION

EHS demonstrated a high sustained closure rate. Given the long suturing time and technical difficulty, EHS should be reserved for cases with a high risk of delayed adverse events.

Clinical utility of a novel anchor pronged clip for mucosal defect closure after colorectal endoscopic submucosal dissection (with video)

Background and study aims The MANTIS Clip (Boston Scientific) is a novel anchor pronged clip designed to enhance tissue grasping and facilitate the closure of defects in the gastrointestinal tract. This study evaluates the feasibility and effectiveness of the MANTIS Clip for closing mucosal defects following colorectal endoscopic submucosal dissection (C-ESD). Patients and methods A retrospective single-center study was conducted on patients who underwent C-ESD with MANTIS Clip closure from May 2023 to April 2024. The primary outcome measured was the complete closure success rate. Secondary outcomes included defect size, sustained closure rate, closure time, number of clips used, adverse events (AEs), and hospital stay duration. Results The MANTIS Clip was used in 52 cases. The complete closure rate was 98.1% (51/52), with a sustained closure rate of 96.1% (49/51). The median closed defect size was 32 mm, with the largest being 62 mm. The median closure time was 8 minutes. Typically, one MANTIS Clip per defect was used, with only one lesion requiring two clips. The median number of additional clips used was seven. AEs included one case of bleeding (1.9%) and one case of post-ESD coagulation syndrome (1.9%), both managed without extending hospital stays. The median C-reactive protein level on the first day post-ESD was 0.35 mg/dL and the median hospital stay was 5 days. Conclusions The MANTIS Clip is effective and practical for mucosal defect closure post-C-ESD, demonstrating high success and sustained closure rates with minimal complications. Future multicenter randomized trials are needed to further assess its efficacy and safety.

Endoscopic suturing for mucosal defect closure following endoscopic submucosal dissection: Systematic review and meta-analysis

Background and study aims: Endoscopic submucosal dissection (ESD) is a minimally invasive and effective treatment for gastrointestinal lesions. It carries potential risks such as bleeding and perforation. This meta-analysis was conducted to assess the safety, effectiveness, and feasibility of endoscopic suturing, a promising technique for closing mucosal defects post-ESD. Methods: We reviewed several databases, including MEDLINE/PubMed, Cochrane Library, Web of Science, and Embase up to May 1,2023. We aimed at identifying original studies that provided insightful data on the use of endoscopic suturing in reducing complications post-ESD. Results: In our study, we evaluated 426 publications and included 10 studies involving a total of 284 patients. The pooled technical success rate of endoscopic suturing was 92.6% (95% confidence interval [CI] 0.88-0.96). The pooled rate for sustained closure of mucosal defects post-endoscopic submucosal dissection (ESD) was estimated to be 80.7% (95% CI 0.71-0.88). The pooled mean time required to perform the endoscopic suturing procedure was calculated to be 31.11 minutes (95% CI 16.01-46.21). Among the studies reviewed for the incidence of delayed perforation post-ESD, a singular event of perforation was documented, suggesting a minimal occurrence. The overall rate of delayed bleeding was 5.3% (95% CI 0.30-0.10). Within the subset of patients using antithrombotic drugs, our subgroup analysis identified a delayed bleeding event rate of 6.7% (95% CI 0.02-0.25). Conclusions: Our results underscore the potential of endoscopic suturing as a viable and efficient technique in managing mucosal defects following ESD, highlighting the need for further large, prospective research to corroborate these findings and concentrate on establishing standard methodologies.

Efficacy of prophylactic clip closure in reducing the risk of delayed bleeding after colorectal endoscopic submucosal dissection in patients on anticoagulant therapy: Multicenter prospective study

OBJECTIVES

The high rate of delayed bleeding after colorectal endoscopic submucosal dissection (ESD) in patients undergoing anticoagulant therapy remains a problem. Whether prophylactic clip closure reduces the rate of delayed bleeding in these patients is unclear. This study aimed to evaluate the efficacy of prophylactic clip closure in patients receiving anticoagulants.

METHODS

This multicenter prospective interventional trial was conducted at nine referral centers in Japan. Patients regularly taking anticoagulants, including warfarin potassium or direct oral anticoagulants, and undergoing ESD for colorectal neoplasms were enrolled. The discontinuation of anticoagulants was minimized according to recent guidelines. After the ESD, post-ESD ulcers were prophylactically closed using endoclips. The primary end-point was the incidence of delayed bleeding. The sample size was 45 lesions, and prophylactic clip closure was considered effective when the upper limit of the 90% confidence interval (CI) for delayed bleeding did not exceed 20%.

RESULTS

Forty-five lesions were used, and three were excluded. Complete closure was achieved in 41/42 lesions (97.6%). The overall delayed bleeding rate was low, at 4.9% (2/41; 90% [CI] 0.8-14.5), which was significantly lower than that at the prespecified threshold of 20% (P = 0.007). The median closure procedure time was 17 min, and the median number of clips was nine. No massive delayed bleeding requiring transfusion, interventional radiology, or surgery was observed, and no thromboembolic events were observed.

CONCLUSION

Prophylactic clip closure may reduce the risk of delayed bleeding following colorectal ESD in patients receiving anticoagulants.

TRIAL REGISTRATION

UMIN Clinical Trial Registry (UMIN000036734).

Loop9 closure technique for mucosal defects after colorectal endoscopic submucosal dissection (with video)

Background and study aims Mucosal defect closure after colorectal endoscopic submucosal dissection (ESD) has the potential to reduce the occurrence of delayed adverse events (AEs) such as bleeding and perforation. This study aimed to assess the feasibility and effectiveness of the Loop9 method for closing mucosal defects following colorectal ESD. Patients and methods A retrospective single-center study was conducted using prospectively collected data from May 2020 to March 2023. Loop9 was deployed through a single instrument channel and anchored with clips at the defect site. Closure was accomplished by tightening the loop and deploying additional conventional clips as needed for complete closure. The primary outcome was complete closure rate, with secondary outcomes including the sustained closure rate at 4 to 5 days post-ESD, closed defect size, closure time, number of additional clips, and incidence of delayed AEs. Results This study included 118 cases. Complete closure was achieved in 96.6% of cases (114/118) with a sustained closure rate of 93.9% (107/114). The median size of the closed mucosal defects was 30 mm (interquartile range [IQR]: 25-38, range: 15-74). The median closure time was 14 minutes (IQR: 11.25-17), and the median number of additional clips deployed was six (IQR: 4-7). Stenosis requiring balloon dilatation was observed in one patient; however, there were no instances of post-ESD bleeding or delayed perforation. Conclusions The Loop9 method proved feasible and effective for closing mucosal defects following colorectal ESD, achieving high rates of complete and sustained closure.

Endoscopic full thickness resection: techniques, applications, outcomes

INTRODUCTION

Endoscopic full-thickness resection (EFTR) represents a pivotal advancement in the minimally invasive treatment of gastrointestinal lesions, offering a novel approach for the management of lesions previously deemed challenging or unreachable through conventional endoscopic techniques.

AREAS COVERED

This review discusses the development, methodologies, applications, and clinical outcomes associated with EFTR, including exposed and device-assisted EFTR, the integration of endoscopic mucosal resection with EFTR in hybrid techniques, and the collaborative approach between laparoscopic and endoscopic surgery (LECS). It encapsulates a comprehensive analysis of the various EFTR techniques tailored to specific lesion characteristics and anatomical locations, underscoring the significance of technique selection based on the lesion's nature and situational context.

EXPERT OPINION/COMMENTARY

The review underscores EFTR's transformative role in expanding therapeutic horizons for gastrointestinal tumors, emphasizing the importance of technique selection tailored to the unique attributes of each lesion. It highlights EFTR's capacity to facilitate organ-preserving interventions, thereby significantly enhancing patient outcomes and reducing procedural complications. EFTR is a cornerstone in the evolution of gastrointestinal surgery, marking a significant leap forward in the pursuit of precision, safety, and efficacy in tumor management.

A strategy combining endoscopic hand-suturing with clips for closure of rectal defects after endoscopic submucosal dissection with or without myectomy (with video)

BACKGROUND AND AIMS

Endoscopic hand-suturing (EHS) has been preliminarily demonstrated to be effective in closing defects after endoscopic submucosal dissection (ESD), but it is not easily performed. We proposed a strategy combining EHS with clips (EHS-Clips) and explored its effectiveness in closing rectal defects after ESD or ESD with myectomy (ESD-ME).

METHODS

In this observational study, data from patients with rectal defects closed using EHS-Clips were reviewed. EHS-Clips refers to a strategy where defects are sutured as much as possible by EHS first, with clips being used to close the remaining parts of defects that cannot be completely sutured. The primary endpoints included complete closure rate, delayed bleeding (DB) rate, and sustained closure rate. Logistic regression analyses were performed to identify risk factors for the sustained closure.

RESULTS

All 49 (100%) defects (42 ESD defects and 7 ESD-ME defects) were completely closed through the strategy of EHS-Clips, with 35 (71.4%) through EHS alone and 14 (28.6%) through EHS and additional clips. No patients experienced DB. Thirty-six (73.5%) defects remained sustained closure on postoperative days 3 to 5 (73.8% for ESD defects vs 71.4% for ESD-ME defects). The multivariate analyses identified a stitch margin of ≥5 mm (hazard ratio, 0.313; 95% confidence interval, 0.023-0.781; P = .009) as the only independent advantage factor for the sustained closure.

CONCLUSIONS

EHS-Clips can be used to effectively close the rectal defects after ESD or ESD-ME and prevent DB. Complete suture with a stitch margin of ≥5 mm may achieve more reliable sustained closure.

Potential for expanded application of endoscopic hand suturing: A pilot study of 15 cases

Endoscopic hand suturing (EHS) was first developed to firmly close a mucosal defect following endoscopic submucosal dissection and has the potential for expanded applications. This study aimed to investigate the feasibility and safety of EHS in various clinical settings. In this single-center pilot study, 15 patients who had diseases with potential indications for EHS were prospectively recruited. Technical success, clinical success after the procedure, and severe EHS-related adverse events (AEs) were evaluated. EHS was applied for defect closure after gastric subepithelial lesion removal under laparoscopic observation (n = 9), defect closure after rectal endoscopic full-thickness resection (EFTR) (n = 2), defect closure after thoracoscopy-assisted esophageal EFTR (n = 1), mucosal closure for gastric ulcer bleeding (n = 1), mucosal closure after peroral endoscopic myotomy (POEM) (n = 1), and postoperative anastomotic leak (n = 1). EHS was completed without severe AEs and the clinical courses were also favorable in 13 patients (87%). The median suturing time was 61 minutes. In patients with POEM and anastomotic leak, EHS was discontinued because of the narrow lumen. In conclusion, EHS appears feasible and safe in situations.

Risk of delayed bleeding after colorectal endoscopic submucosal dissection: the Limoges Bleeding Score

BACKGROUND

Clinically significant delayed bleeding (CSDB) is a frequent, and sometimes severe, adverse event after colorectal endoscopic submucosal dissection (ESD). We evaluated risk factors of CSDB after colorectal ESD.

METHODS

We analyzed a prospective registry of 940 colorectal ESDs performed from 2013 to 2022. The incidence of bleeding was evaluated up to 30 days. Risk factors for delayed bleeding were evaluated by multivariate logistic regression. A Korean scoring model was tested, and a new risk-scoring model was developed and internally validated.

RESULTS

CSDB occurred in 75 patients (8.0%). The Korean score performed poorly in our cohort, with a receiver operating characteristic (ROC) curve of 0.567. In the multivariate analysis, risk factors were age ≥75 years (odds ratio [OR] 1.63; 95%CI 0.97-2.73; 1 point), use of antithrombotics (OR 1.72; 95%CI 1.01-2.94; 1 point), rectal location (OR 1.51; 95%CI 0.92-2.48; 1 point), size >50 mm (OR 3.67; 95%CI 2.02-7.14; 3 points), and American Society of Anesthesiologists (ASA) score of III or IV (OR 2.26; 95%CI 1.32-3.92; 2 points). The model showed fair calibration and good discrimination, with an area under the ROC curve of 0.751 (95%CI 0.690-0.812). The score was used to define two groups of patients, those with low-medium risk (0 to 4 points) and high risk (5 to 8 points) for CSDB (respective bleeding rates 4.1% and 17.5%).

CONCLUSION

A score based on five simple and meaningful variables was predictive of CSDB.

Continuous suture technique increases the complete closure rate of colorectal mucosal defects after endoscopic resection: a single-blind, randomized controlled trial

BACKGROUND

Complete closure of mucosal defects after colorectal endoscopic submucosal dissection (ESD)/piecemeal endoscopic mucosal resection (p-EMR) procedures reduces postoperative adverse events, but the complete closure rate of the traditional method using only hemostatic clips is not satisfactory. Therefore, we invented a continuous suture technique using a barbed suture and clips to increase the complete closure rate of colorectal mucosal defects.

METHODS

Patients with a single large (≥ 2 cm) colorectal lesion were recruited. After completion of the ESD/p-EMR procedures, they were randomly allocated to the treatment group or control group. The mucosal defects of the treatment group were closed using barbed suture and clips, while the control group was closed using only clips.

RESULTS

From January 18, 2022 to April 13, 2022, a total of 62 patients with colorectal lesions were enrolled, with 31 patients in each group. Complete closure was achieved in 29 patients (93.5%) in the treatment group and 18 patients (58.1%) in the control group (P = 0.001). The median closure time was 13 min in the treatment group and 19 min in the control group (P < 0.001). The median closure speed was 6.4 cm2/10 min in the treatment group and 3.5 cm2/10 min in the control group (P = 0.008).

CONCLUSIONS

This study provided a clinically feasible continuous suture technique that was safe and effective for the complete closure of colorectal mucosal defects after endoscopic resection.

Reopenable clip-over-the-line method for closing large mucosal defects following colorectal endoscopic submucosal dissection: A feasibility study

Background and study aims Complete closure of large defects after colorectal endoscopic submucosal dissection (ESD) can be problematic, especially in challenging areas or lesions larger than half the lumen circumference. We report a reopenable clip-over-the-line method for such defects and aim to investigate its feasibility through a case series. Patients and methods We retrospectively evaluated data from 30 consecutive patients who underwent ESD with defect closure using the reopenable clip-over-the-line method between October 2020 and September 2022. This method requires the first clip-with-line grasp of the oral side's defect edge and muscle layer. The next reopenable clip (with a line fed through a hole in the reopenable clip tooth) is placed on the opposing mucosal defect edge and muscle layer. This process is repeated until complete closure. The primary study outcome was the rate of complete mucosal defect closure. We also reported post-procedure bleeding or perforation. Results The median dimensions of the resected specimens were 45 mm (range, 35-70) by 39 mm (range, 29-60). Complete closure was achieved for all defects, including nine rectal defects, of which three bordered the anal verge. Of the 30 defects included in this study, nine were larger than half the lumen circumference. The median closure time was 25 minutes (range, 14-52), and the median clip number was 17 (range, 9-42). No post-procedure bleeding or perforation occurred. Conclusions The reopenable clip-over-the-line method is a feasible technique for the complete closure of large colorectal defects after endoscopic submucosal dissection, regardless of location.

Novel closure method for a large mucosal defect after endoscopic resection: String clip suturing method with an anchor

Duodenal endoscopic submucosal dissection (ESD) is a high-risk technique; however, prophylactic closure of mucosal defects reduces the risk. Unfortunately, we have encountered cases where closure is difficult, especially in large lesions. Therefore, we developed a novel closure technique, a string clip suturing method with an anchor (SCSM-A). This study aimed to elucidate the feasibility of this method. Five patients underwent this method for the closure of mucosal defects after duodenal ESD. The initial string clip was deployed at the anal end of the mucosal defects and the second clip was deployed at the other end of the mucosal defect. A third clip was deployed on the muscular layer in the middle of the mucosal defect. The free end of the string was pulled, and additional clips were deployed around the first to the third clips for complete closure. Because of grasping the muscle layer, SCSM-A can be employed for secure closure without creating a pocket. We reviewed the background and clinical course of hospitalization of patients who underwent this method. The resected specimens ranged from 52 to 103 mm in diameter. Complete closure of the mucosal defects was possible in all the cases. There were no adverse events, and no cases required additional treatment. All the patients were discharged within 7 days. The new method achieved secure closure even for large mucosal defects after duodenal ESD. This is a technique that can be applied to other organs, e.g., the colon.

Suturing techniques with endoscopic clips and special devices after endoscopic resection

Endoscopic submucosal dissection is an established method for complete resection of large and early gastrointestinal tumors. However, methods to reduce bleeding, perforation, and other adverse events after endoscopic resection (ER) have not yet been defined. Mucosal defect closure is often performed endoscopically with a clip. Recently, reopenable clips and large-teeth clips have also been developed. The over-the-scope clip enables complete defect closure by withdrawing the endoscope once and attaching the clip. Other methods involve attaching the clip-line or a ring with an anchor to appose the edges of the mucosal defect, followed by the use of an additional clip for defect closure. Since clips are limited by their grasping force and size, other methods, such as endoloop closure, endoscopic ligation with O-ring closure, and the reopenable clip over-the-line method, have been developed. In recent years, techniques often utilized for full-thickness ER of submucosal tumors have been widely used in full-thickness defect closure. Specialized devices and techniques for defect closure have also been developed, including the curved needle and line, stitches, and an endoscopic tack and suture device. These clips and suture devices are applied for defect closure in emergency endoscopy, accidental perforations, and acute and chronic fistulas. Although endoscopic defect closure with clips has a high success rate, endoscopists need to simplify and promote endoscopic closure techniques to prevent adverse events after ER.

Clinical and technical outcomes of endoscopic closure of postendoscopic submucosal dissection defects: Literature review over one decade

Endoscopic submucosal dissection (ESD), which enables curative en bloc resection of early gastrointestinal neoplasms, has been an attractive minimally invasive surgery during the past two decades. Large post-ESD defects must be carefully managed to prevent adverse events (AEs). The major AEs comprise delayed bleeding (DB) and delayed perforation (DP), and overall AEs comprise DB plus DP. This review aimed to clarify the clinical efficacy and technical outcomes of endoscopic prophylactic closure for post-ESD defects. We identified studies involving ≥10 patients up to March 2022 in which endoscopic closure was applied for gastric, duodenal, and colorectal post-ESD defects. In the stomach, total rates of overall AEs and DB were significantly lower in the closure than non-closure group. In the duodenum, total rates of overall AEs, DB, and DP were significantly lower in the closure group. In the colorectum, total rates of overall AEs and DB were significantly lower in the closure group. Closure techniques, categorized into three groups (clip-based techniques, mechanical clipping, and surgical stitch-based techniques), were illustrated. Endoscopic closure demonstrated a certain ability to reduce DB after gastric, duodenal, and colorectal ESD as well as DP after duodenal ESD. Considering closure-associated costs, the indications and limitations of closure techniques should be further investigated.

Clip stopper closure method using a detachable snare in combination with ZEOCLIP for endoscopic submucosal dissection-induced mucosal defects

Endoscopic submucosal dissection (ESD) is globally performed to treat early epithelial tumors of the gastrointestinal tract, but delayed perforation is a problematic procedure-related complication. To address this problem, closure of ESD-induced mucosal defects with a detachable snare has been reported. However, one problem is that this method usually requires some degree of skill and replacing a single-channel scope with a two-channel scope. We developed the clip stopper closure (CSC) method using a detachable snare in combination with the ZEOCLIP, which can be easily performed with a single-channel scope, for ESD-induced mucosal defects. Six consecutive cases were treated with this closure method for colonic ESD-induced mucosal defects. The median closure time was 12.5 (10-24) min, and the success rate of this procedure was 100%. Our CSC method was able to be performed in any part of the colon. In conclusion, the CSC method using a detachable snare in combination with the ZEOCLIP is a simple but promising closure technique for ESD-induced mucosal defects.

Application of a traction metal clip with a fishhook-like device in wound sutures after endoscopic resection

BACKGROUND/AIMS

Endoscopic wound suturing is an important factor that affects the ability to remove large and full-thickness lesions during endoscopic resection. We aimed to evaluate the effect of a traction metal clip with a fishhook-like device on wound sutures after endoscopic resection.

METHODS

From July 2020 to April 2021, patients who met the enrollment criteria were treated with a fishhook-like device during the operation to suture the postoperative wound (group A). Patients with similar conditions and similar size wounds who were treated with a "purse-string suture" to suture the wounds were retrospectively analyzed as the control group (group B). Difference in the suture rate, adverse events, time required for suturing, and number of metal clips were compared between the two groups.

RESULTS

The time required for suturing was 7.72±0.51 minutes in group A and 11.50±0.91 minutes in group B. This difference was statistically significant (F=13.071, p=0.001). The number of metal clamps used in group A averaged 8.1 pieces/case, and the number of metal clamps used in group B averaged 7.3 pieces/case. This difference was not statistically significant (F=0.971, p>0.05).

CONCLUSION

The traction metal clip with the fishhook-like device is ingeniously designed and easy to operate. It has a good suture effect on the wound after endoscopic submucosal dissection and effectively prevents postoperative adverse events.

Prophylactic clip closure for mucosal defects is associated with reduced adverse events after colorectal endoscopic submucosal dissection: a propensity-score matching analysis

Background

It is unclear whether prophylactic endoscopic closure after colorectal endoscopic submucosal dissection (ESD) reduces the risk of postoperative adverse events due to variability in lesion characteristics. Therefore, we conducted a retrospective study using propensity score matching to evaluate the efficacy of prophylactic clip closure in preventing postoperative adverse events after colorectal ESD.

Methods

This single-center retrospective cohort study included 219 colorectal neoplasms which were removed by ESD. The patients were allocated into the closure and non-closure groups, which were compared before and after propensity-score matching. Post-ESD adverse events including major and minor bleeding and delayed perforation were compared between the two groups.

Results

In this present study, 97 and 122 lesions were allocated to the closure and non-closure groups, respectively, and propensity score matching created 61 matched pairs. The rate of adverse events was significantly lower in the closure group than in the non-closure group (8% vs. 28%, P = 0.008). Delayed perforation occurred in two patients in the non-closure group, whereas no patient in the closure group developed delayed perforation. In contrast, there were no significant differences in other postoperative events including the rate of abdominal pain; fever, white blood cell count, and C-reactive protein; and appetite loss between the two groups.

Conclusions

Propensity score matching analysis demonstrated that prophylactic closure was associated with a significantly reduced rate of adverse events after colorectal ESD. When technically feasible, mucosal defect closure after colorectal ESD may result in a favorable postoperative course.

Feasibility of endoscopic hand suturing on rectal anastomoses in ex vivo porcine models

Prevention of postoperative anastomotic leakage in rectal surgery is still required. This study investigated the feasibility of endoscopic hand suturing (EHS) on rectal anastomosis ex vivo. By using isolated porcine colon, we prepared ten anastomoses 6–10 cm from the virtual anus. Then, we sutured anastomoses intraluminally by EHS, which involved a continuous suturing method in 5 cases and a nodule suturing method with extra corporeal ligation in 5 cases. Completeness of suturing, number of stitches, procedure time and presence of stenosis were investigated. Furthermore, the degree of stenosis was compared between the two suturing methods. In all cases, EHS were successfully completed. The median number of stitches and procedure time was 8 and 5.8 min, respectively. Stenosis was created in all continuous suturing cases whereas none was seen in nodule suturing cases. The shortening rate was significantly greater in the continuous suturing method than in the nodule suturing method. Intraluminal reinforcement of rectal anastomosis by EHS using nodule suturing with extra corporeal ligation is feasible without stenosis, which may be helpful as a countermeasure against possible postoperative anastomotic leakage in rectal surgery.

GIE Editorial Board top 10 topics: advances in GI endoscopy in 2020

The American Society for Gastrointestinal Endoscopy's Gastrointestinal Endoscopy Editorial Board reviewed a systematic literature search of original endoscopy-related articles published during 2020 in Gastrointestinal Endoscopy and 10 other high-impact medical and gastroenterology journals. Votes from each individual board member were tallied to identify a consensus list of the 10 most significant topic areas in GI endoscopy over the calendar year of study using 4 criteria: significance, novelty, impact on national health, and impact on global health. The 10 areas identified were as follows: artificial intelligence in endoscopy, coronavirus disease 2019 and GI practice, third-space endoscopy, lumen-apposing metal stents, single-use duodenoscopes and other disposable equipment, endosonographic needle technology and techniques, endoscopic closure devices, advances in GI bleeding management, improvements in polypectomy techniques, and bariatric endoscopy. Each board member contributed a summary of important articles relevant to 1 to 2 topic areas, leading to a collective summary that is presented in this document of the "top 10" endoscopic advances of 2020.